[Danbooru] add 'random' extractor

Adds a new `DanbooruRandomExtractor` to support downloading from `danbooru.donmai.us/posts/random?tags=` URLs.

test/results/aibooru.py

@@ -80,4 +80,24 @@ __tests__ = (
     "#class"   : danbooru.DanbooruPopularExtractor,
 },
 
+{
+    "#url"     : "https://aibooru.online/posts/random?tags=center_frills&z=1",
+    "#category": ("Danbooru", "aibooru", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+    "#pattern" : "https://cdn.aibooru.download/original/.+",
+    "#count"   : 1,
+
+    "search_tags": "center_frills",
+},
+
+{
+    "#url"     : "https://aibooru.online/posts/random",
+    "#category": ("Danbooru", "aibooru", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+    "#pattern" : "https://cdn.aibooru.download/original/.+",
+    "#count"   : 1,
+
+    "search_tags": "",
+},
+
 )

test/results/atfbooru.py

@@ -36,4 +36,16 @@ __tests__ = (
     "#class"   : danbooru.DanbooruPopularExtractor,
 },
 
+{
+    "#url"     : "https://booru.allthefallen.moe/posts/random?tags=yume_shokunin",
+    "#category": ("Danbooru", "atfbooru", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+},
+
+{
+    "#url"     : "https://booru.allthefallen.moe/posts/random",
+    "#category": ("Danbooru", "atfbooru", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+},
+
 )

test/results/booruvar.py

@@ -37,4 +37,16 @@ __tests__ = (
     "#class"   : danbooru.DanbooruPopularExtractor,
 },
 
+{
+    "#url"     : "https://booru.borvar.art/posts/random?tags=chibi&z=1",
+    "#category": ("Danbooru", "booruvar", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+},
+
+{
+    "#url"     : "https://booru.borvar.art/posts/random",
+    "#category": ("Danbooru", "booruvar", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+},
+
 )

test/results/danbooru.py

@@ -382,4 +382,24 @@ __tests__ = (
     "other_names": list,
 },
 
+{
+    "#url"     : "https://danbooru.donmai.us/posts/random?tags=bonocho",
+    "#category": ("Danbooru", "danbooru", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+    "#pattern" : "https://cdn.donmai.us/original/.+",
+    "#count"   : 1,
+
+    "search_tags": "bonocho",
+},
+
+{
+    "#url"     : "https://danbooru.donmai.us/posts/random",
+    "#category": ("Danbooru", "danbooru", "random"),
+    "#class"   : danbooru.DanbooruRandomExtractor,
+    "#pattern" : "https://cdn.donmai.us/original/.+",
+    "#count"   : 1,
+
+    "search_tags": "",
+},
+
 )